Information recording medium and method of manufacturing glass substrate for the information recording medium, and glass substrate for the information recording medium, manufactured using the method
    9.
    发明申请
    Information recording medium and method of manufacturing glass substrate for the information recording medium, and glass substrate for the information recording medium, manufactured using the method 审中-公开
    用于信息记录介质的信息记录介质和制造玻璃基板的方法以及使用该方法制造的用于信息记录介质的玻璃基板

    公开(公告)号:US20050074635A1

    公开(公告)日:2005-04-07

    申请号:US10392248

    申请日:2003-03-19

    IPC分类号: G11B5/64 G11B5/84 G11B5/66

    摘要: There is provided an information recording medium and a method of manufacturing a glass substrate for information recording media as well as a glass substrate manufactured using the method, according to which the take-off height (TOH) of a HDD for example can be made low. The surface shape in a predetermined region of an information recording medium is measured using an optical interferometer or an atomic force microscope. The measured surface shaped is subjected to line analysis along the circumferential direction of the information recording medium. A calculation is made of the product PSD×f of PSD corresponding to a predetermined wavelength ν and the reciprocal of the predetermined wavelength ν. The maximum value of the calculated PSD is controlled to not more than a predetermined value. As a result, the TOH can be made low by reducing waviness which hinders the magnetic head of a HDD or the like from stably flying.

    摘要翻译: 提供了一种信息记录介质和用于信息记录介质的玻璃基板的制造方法以及使用该方法制造的玻璃基板,根据该方法,例如可以使HDD的起飞高度(TOH)低 。 使用光学干涉仪或原子力显微镜测量信息记录介质的预定区域中的表面形状。 测量的表面形状沿着信息记录介质的圆周方向进行线分析。 对与预定波长nu对应的PSD的乘积PSDxf和预定波长nu的倒数进行计算。 将计算出的PSD的最大值控制在规定值以下。 结果,通过减少妨碍HDD等的磁头稳定地飞行的波纹,可以使TOH变低。